21278928

素因数分解:

$2^4\times 3^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{211}}^1$

素因数の和:424

約数の個数: 80

約数和(自身を含む): 60567552

約数和(自身を除く): 39288624

約数列:

[1, 2, 3, 4, 6, 8, 11, 12, 16, 22, 24, 33, 44, 48, 66, 88, 132, 176, 191, 211, 264, 382, 422, 528, 573, 633, 764, 844, 1146, 1266, 1528, 1688, 2101, 2292, 2321, 2532, 3056, 3376, 4202, 4584, 4642, 5064, 6303, 6963, 8404, 9168, 9284, 10128, 12606, 13926, 16808, 18568, 25212, 27852, 33616, 37136, 40301, 50424, 55704, 80602, 100848, 111408, 120903, 161204, 241806, 322408, 443311, 483612, 644816, 886622, 967224, 1329933, 1773244, 1934448, 2659866, 3546488, 5319732, 7092976, 10639464, 21278928]

約数ペア:

[(1, 21278928), (2, 10639464), (3, 7092976), (4, 5319732), (6, 3546488), (8, 2659866), (11, 1934448), (12, 1773244), (16, 1329933), (22, 967224), (24, 886622), (33, 644816), (44, 483612), (48, 443311), (66, 322408), (88, 241806), (132, 161204), (176, 120903), (191, 111408), (211, 100848), (264, 80602), (382, 55704), (422, 50424), (528, 40301), (573, 37136), (633, 33616), (764, 27852), (844, 25212), (1146, 18568), (1266, 16808), (1528, 13926), (1688, 12606), (2101, 10128), (2292, 9284), (2321, 9168), (2532, 8404), (3056, 6963), (3376, 6303), (4202, 5064), (4584, 4642)]